Truck-bolster.



I No. 881,220. PATENTED MAR. 10, 1908'. A. S., BLANCHARD & H. M. FO0TE..

TRUGK BOLSTER. APPLICATION FILED NOV.28, 1906.

2 SHEETS-SHEET 1.

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ARTHUR S. BLANOHARD AND HARRY M. FOOTE, OF OLEVELANEOHIO.

TRUCK-BOLSTEB.

Specification of Letters Patent.

Patented March 10., 1908.

l Application filed-November 28, 1906. Serial No.'345 ,43 l.

. being herein explained, and the best mode in which We havecontemplated applying.

that principle, so as 'to distinguishlt from likewise, embodiestheimproved features vertically disposed side plates a' laterallymotherinventions.

Ourinvention relates in general to the construction of cast metallicbolsters and has regard more'particularly to the construction of animproved type ofcartruck bolster out of cast steel, The object ofsuchinvention is the The annexed drawings and the following- 'descrition set forth in detail certain means embo ying ,the invention, such dsclosed means constituting but one of venous mechanical forms in whichthe principle of the invention may be used.

In said annexed drawings: Figure 1. represents a plan viewof oneapproved form of-- bolster embodying the principle of our invention;Fig. 2 is a view, partly in side elevation and partly in longitudinalcrosssection, of the same; Fig. is a vertical transverse cross-sectionof such bolster, takenon a plane passing through the-line 3'3-, Fig. 2;while Fig. 4 is a similar crosssection taken on the line 4-4, Fig. 2;Fig. 5 is a plan View, and Fig. 6 is a view partly in side elevation'andpartly in cross-section as before, of a second type of bolsterembodyingour improved. prlnciple of construction: while Figs. 7 and 8 are,respectively, a plan view and a view in side elevationnml crosssectionof yet athird type-of bolster, which,

above referred to.

production of a bolster. that will present-the desir- 20- From aninspection of the foregoing fig ures, 1t will be noted that in all threeat the closed, there enters atop member A and a bottom member Bseparated at their middle prints and directly .united at their ends, a

g post C (or queen post as it may be in certain cases more ap ropriatelydenominated), being interpose between said memand lower member B are inthe form of lighter than the lower plate. Upper plate then is furtherstrengthened by being formed on its under face throughout its lengthwith lateral flanges a whereby a substantially channel cross-sectionpresented, Fig. 3. It should be added that such flanges may be formed onthe upper face-w ith practically the same result so far as thestrengthening effect is concerned, it'being, however, a matter ofdownwardly, as shown Figs. 2, 6 and 8. Bottom plate B is similarlyformed throughverted T vCI'OSS-S6Ct1OI1 Fig. 3.

From the construction as thus far set forth, it will be seen that astrict truss structure is formed by reason of the fact that the top andbottom members are directlyunited at their ends "and the strut ('7interposed between their separated portions. It is. immaterial whetheror not upper late A be preserved rectilinear throughout its length for,as indicated in Fig. 6, it may be desirable to slope it from the centralpoint to conform. with the demands "of certain classes of'service. 7

Upper plate A is provided with the usual center'bearing a situatedirectly above post C, and with side bearings a near its ends. The pointwhere bottom member Bunites directly, as above specified, with topmember A should be substantially-at the points of most advantageouslyutilized for withstanding the strains to which such bolster issubbolster are furtherprovided with integral illustrative formsofbolster thereby dis-.

bers at such middle points whereby a truss. structure is formed. Suchupper member A plates, the upper plate being materially convenience tohave such flanges disposed support of the bolster in order that thetrussv structure attained in our bolster may be jected in service. Therespective ends of the out its length on its upper face with a centralrib b thereby giving to it a substantially inr in the two forms of thebolster illustrated in Figs. 1 and 5, respectively, for the purpose ofcoring the casting. In the forms of such bolster illustrated in Figs'land 5, bottom member B is divided near each extremity into an'upper andlower portion 1) If, such upper portion having a cross-sectionsubstantla ly the same as that of the top late, or being, in otherwords, materially ighter than the majorportion of bottom member B. The

lower portlon b of bottom member B extends practically horizontally, orparallel with the continuation formed of the union of upper portion 1)with top member A extending beyond their point of junction. Such bottomportion of member B accordingly forms a sort of box at the end. of, thebolster, the bottom of which is'designed to be utilized as a seat orbearing for springs or devices whereby the bolster ends are suported'upon the under parts of the assemb ed car truck:

The description thus far given applies with practically equal force tothe first two types of our bolster illustrated in Figs. 1 and 2-, andFigs. 5 and 6, respectively; the only difference between these twotypes, it may be remarked, is'that in the second the continuation of topand bottom members A B beyond their point of junction or, in otherwords, the points of support of the bolster, has been omitted. Thedivision of the extremities of the bottom member into an'upper and alower portion and the consequent formation of boxes providing springseats at the bolster 'ends is substantially the same in both. By

the division of the lower member B into an upper and a lower portion asdescribed, not on y is a wasteful use of material avoided, for aconsideration of the stresses to whichthe parts are subjected indicatesthat the upper portion of such member need not be as eavy as the majorportion or bottom member roper; but furthermore we avoid a serious'ability to breakage that w 'o uld otherwise be present, for where suchbottom member, bemg of heavier cross-section, is joined directly to thetop member in the fashion contemplated by ourinvention, there is greatlikelihood of a crack developing at the point of junction immediatelyafter casting in the.

course of cooling,

The third illustrative type of bolster, that shownm Figs. 7 and 8,'is"in certain respects the simpler of the three, since in it such divisionof the outer extremity of member B into an upper and lower portion isnot utilized for the purposeof forming a spring seat as in the two othertypes of bolsters. To secure, however, the beneficial results abovenoted as being derived by having the bottom member B of substantiallythe same crosssection as top member A, where it unites with the latter,such botto'm member is made to decrease in section as it approaches thepoint of junction. No closed box being formed, it is not necessary toprovide end plate a with an aperture as before and in lieu of suchclosed box an open box structure is formed by the provision of thetransverse flange or web a on the under side of bottom member B a shortdistance from its point of junction with upper member A.

uch transverse flange a may for our purpose be regarded in its relationto bottom member B as being the equivalent of lower portion b in thefirst described types of bolster; and the decrease in the'section of thelower member may be begun at the point where the flange springs fromsuch member. Where, however, the flange is located nearer to the pointof junction of the top and bottom members, the decrease in section ofmember B will not be limited to the space intervening between the flangeand such point. Additional transverse webs between flange a and endplate a may, if desired, be introduced, and a support for the springhearing plate thus provided. This type of bolster, as illustrated,furthermore embodies a downwardly sloping upper member as in the secondtype illustrated in Figs. 5 and 6.

Lateral plates a and end plates an hence extend above as well as belowthe united continuation of top and bottom plates A B, and, to furtherstrengthen the end of the bolster, lon itudinal ribs (1 .two as shownare provide on the upper face of the united continuation of top andbottom members A B, such ribs extending inwardly towards the center ofthe bolster on top plate A also.

By the direct union of the top and bottom members and a consequentattainment of a strict truss construction much greater rigidity issecured to our bolster than where such ends are not united directly'b'utby means of transverse vertically disposed webs or plates. At the sametime the desired box necessary to form a bearing for the springs of thecar truck is provided by a division of the material in the bottom memberB of thelbolster, which member must necessarily be made of heaviermaterial throughout the major portion of its length,

andw'iich, if directly united to stop member A, the latter being oflighter cross-section, would lead to the harmful results already noted.Hence not only is a saving of mawithout aconsequen t reduction in theability 1 of such members to sustain theload to which 1 they arerespectively subjected.

Having thus "described our invention in detail, that which weparticularly point out and distinctly claim is':- Y I 1. A cast metallicbolster comprising a top member and a bottom member separated at theirmiddle points and prolonged so as to unite directly at their ends, and apost interposed between said members at such middle points, whereby atruss structure is formed. I

'2. A cast metallic bolster comprising'a top plate anda bottom-plateseparated at'their 7 middle points and prolonged so as to unite directlynear the endsofthe bolster, and a hollow post interposed between. saidplates at such middle polnts and serving as a strut, whereby a trussstructure is formed.

3. A cast metallic bolster comprising a top plate and a bottom plateseparated at their middle points andprolon ed so as to unite, directlynear the ends :0 bolster and substantially at the points support of thelatter, and a hollow post interposed between said plates at such middlepoints and serving as-a strut, whereby a truss-struc ture is formed. l

4. A cast metallic bolster comprising a top-member of substantiallychannel crosssectionthroughout its length and a bottom' member ofsubstantially inverted T cross section throughout its length, saidmembers being separated at'their middle points and prolonged soasto-unite directlyat their ends, and a post interposed between saidmembers at such middle points and serving as a strut, whereby-a trussstructure is formed.

"5. A cast metallic bolster comprising a top plate of substantiallychannel crosssection throughout its length, and a bottom plate ofsubstantially inver ed T cross-sec tion throughout its'length, saidplates being separated at their middle points and prolonged so as tounite directly near the ends of the bolster, and a hollow postinterposed between said plates at such middle points and serving as astrut, whereby a truss structure is formed.

6. A cast metallic bolster comprising a top plate formed on its underiace'throug'hbottom plate formed a -on its upper face throughout itslength with a central rib, said platesbeing separated at their middlepoints and prolonged so as to unite directly near the ends of thebolster substantially at the points of support of the latter, and ahollow post interposed between said plates at such middle points andserving .as a strut, whereby a truss structure is formed.

7 A cast metallic bolster .com rising a "top member and a bottom erseparated =at their middle points and prolonged so as to unite directlyat their ends, .a hollow post interposed between said members :at v

such iniddle points and serving as a strut, whereby a truss structure 18formed, and

vertical side .pla-tes joining the edges of said top and bottom membersnea-rlthe ends 0 said bolster.

8. Acast metallic bolster comprisingp, top member and a bottom memberseparated at vtheir middle points and directly united at their ends, apost interposed between said members at such middle points and servingas a strut, whereby a truss structure is formed, and vertical sideplates joining the '1' edges of said top and-bottom member "near theends of said bolster, said bottom member beingdivided near eachextremity into an upper-and a lower portion, such lower portion joiningthe lower edges of said side-plates.

9. Acastmetallic bolster comprisi atop member and a bottom memberseparated at l their middle points and directly united at theirends,said top member bein materially lighter than said bottom mem er, a postinterposed between said' members at such middle points and-serving as astrut whereby a trussstructure is formed, and yertical side platesjoining the edges of said top and bot-- tom member near the ends of saidbolster, said bottom member being divided near each extremity into anupper and a lower portion, such lower portion joining-the lower edges ofsaid side-plates.

10. A cast metallic bolster comprising a top plate and a bottom plateseparated at. their middle points and directly united near the ends ofthe bolster, a hollow post in-terposed between said top and bottomplates at such middle points and serving as a strut, whereby a trussstructure is formed, and

vertical. side-plates joining the sides of said v but its length withlateral flanges and a the ends of t e bolster, said top plate beingsection as said top plate and such lower por- .tion joining the edges ofsaid side-plates.

12. cast steel bolster comprising a top plate of substantially invertedchannel crosssection throu hout its length, abottom plate ofsubstantialdy inverted T form throughout its length, said pla t-es beingseparated at their middle'points and united near the ends of the bolsterand substantially at the points of support of the latter, and said topplate being materially lighter than said bottom plate, a,

hollow post interposed between said top and bottom plates at such middlepoints and serving as a strut, whereby a truss structure is formed, andvertical side-plates joining the sides of said top and bottom membersnear theends of said bolster, said bottom member being divided near eachextremity into an upper and a lower portion, such upper portion being ofsubstantially the same cross-sec tion as said top plate and such lowerportion joining the lower ed es of said-side-plates.

13. A cast metal is bolster comprising a top member and a bottom memberseparated at their middle points and prolonged so as to directly unitenear the ends of the bolster,

. hol

said united members extending as one member from their point of junctionto the corresponding extremity of the bolster, and a ow post interposedbetween said member at such middle points and serving as a strut,whereby a truss structure is formed.

14. A cast metallic bolster comprising a top plate and a bottom plateseparated at their middle points and prolonged so as to directly unitenear the ends of the bolster and substantially'at the. points of supportof the latter, said united plates extending as one plate from theirpoint of junction to the corresponding extremity of the bolster,vertical side plates joining the edges of said top and bottom platesattheir point of junction,

, and a hollow post interposed between said members at such middlepoints and serving as a strut, whereby a truss structure isformed.

15. A cast metallic bolster comprising a top-plate of substantiallychannel cross-section throughout its length, a bottom plate ofsubstantially inverted T prosssection throughout its length, said platesbeing separated at their middle points and united near the ends of saidbolster and substantially at the points of support of the latter, saidunited plates continuing as one plate from their -ends of the bolster,said to point of junction to the corresponding extremity ot the bolster,vertical side plates joining the edges of said top and bottom platesnear the ends of said bolster, and extending above as well as below theunited continuation of said plates, and a hollow post inter )osedbetween said members at such middle points and serving as a strut,whereby a truss structure is formed.

16. A cast steel bolster comprisin a top plate of substantially invertedchanne crosssection throughout its length, a bottom plate ofsubstantially inverted T cross-section throughout its length, saidplates being separated at their middle pointsand united near the ends ofsaid bolster and substantially at the points of support of the latter,said united plates continuing as one plate from their point of junctionto the correspondin extremity of the bolster, vertical side p atesjoining the edges of said top and bottom plates near the ends of saidbolster and extending above as well as below the united continuation ofsaid plates, a vertical end plate joining said side plates, longitudinalribs on the upper face of such united continuation intermediate of saidlateral plates and extending some distance on said top plate, anda'hollow post interposed between said members at such middle pointsandserving as a strut, whereby a truss structure is formed.

17. A cast steel bolster comprising a top plate of substantiallyinverted channel crosssection throughout its length, a bottom plate ofsubstantially inverted T cross-section throughout its length, saidplates being separated at their middle points and directly united nearthe ends of said bolster and substantially at the )Oints of support ofthe latter, said united plates continuing as one plate from their pointof junction to the corresponding extremity of the bolster, verticalside-plates joining the edges of said top and bottom plates near theends of said bolster and extending above as well as below the unitedcontinuation of said plates, a vertical end plate joining saidside-plates, a transverse web on the under-side of said bottom plateparallel with said end plate, longitudinal ribs on the u per face ofsuch united con-' tinuation of saii top and bottom plates and extendingsome distance on said top plate, and a hollow post interposed betweensaid members at such middle points and serving as a strut, whereby atruss structure is formed.

18. A cast metallic bolster comprising a top member and abottom memberseparated at their middle points and united near the member beingmaterially lighter thansaid ottom member,

said bottom member, however, decreasing in crosssection to substantiallythat. of said upper member as it approaches the point ef Sig ned by us,this 24th day of November; its junctlon therewith, and said united mem-1906. bers extending as one member from their ARTHUR s. BLANOHARD pemtof unctmnto the corres ondmg ex- I 5 tremity of the bolster, and. a ho0w post in- HARRY FOOTET terposed between said members at such mid-Attestedbv dl'e points and serving as a strut, whereby a D. T. DAVIES,

'trqss structure is formed. I JNO. F. OBERIZIN;

